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Hot Wire Anemometry

Discussion in 'Beginner Electronics' started by Tommy, Apr 13, 2005.

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  1. Tommy

    Tommy Guest

    Hello world,
    does anybody know how to do a 'Hot Wire Anemometry'- Amplifier-Servo.
    I have made a sensor out of a small filament-lamp but am not sure about the amp.


    Thanx in advance,
    // Tommy
  2. Harold Ryan

    Harold Ryan Guest

    Hot wire anemometers require constant current control. The best way is to
    insert a resistor in series with the hot wire and keep the measured voltage
    across the resistor constant. Therefore, this is a closed loop circuit.
  3. Coyoteboy

    Coyoteboy Guest

    i looked on, i think, and found a 'rugged'
    transistor based setup - slower to react than wire but still good, and
    PWM output - ive yet to build it cos i cant find the transistors easily.
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